User's Manual

Diagnostic Memory Functions (Statistics)

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Ventricular extrasystoles are counted both as VES as well as ventricular

sense events.

Special Events

The following events can be recorded:

— Successful AV scan hysteresis

— Overdrive safety switch-off

— Mode switching counter

— PMT termination

— VES lock-in protection

Note: All event counter data are transmitted to the

programmer and evaluated there, but not all events

are displayed in detail on the programmer.

Atrial and Ventricular Rate Histogram

Dual-chamber pacemakers are equipped with a separate atrial and

ventricular histogram. A bar chart displays the heart rate percentages

as well as the absolute values. The number of times a heart rate occurs

within certain rate ranges is recorded separately according to sensing

and pacing. The rate range is divided into 16 equidistant rate classes

between

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40 and 180 ppm. The distribution of occurring heart rates

can be displayed in a chart during follow-up.

Valid for Cylos DR and

Cylos DR-T

A/V Rate Trend

The A/V rate trend is displayed as a line chart and consists of the heart

rate trend and the pacing rate trend. Both atrial as well as ventricular

events are recorded at a fixed point in time. There are two available

kinds of recording, a short-term trend ([12 min/fixed]) and a long-term

trend ([auto/rolling]). The long-term trend begins with a resolution of 2

seconds with 120 time intervals, the time intervals are continually

compressed and in the last compression level the recording takes

place with a resolution of 512 seconds and 180 time intervals.

Subsequently, the long-term trend is recorded in repetitive cycles. The

general rule is that the shorter the recording interval, the higher the

resolution. The short-term trend thus serves to create a very exact

recording of short-term rate changes, for instance during an exercise

test.